Mosquito nets impregnated with insecticides are
recommended for the control of the vectors of
malaria, particularly in Sub-Saharan Africa
where their effectiveness is no longer to be demons -
trated (Lines, 1996). Nowadays, only the pyrethroid
insecticides are used, because of their speed of action,
their high repulsive and irritating capacity towards mosquitoes,
and their low toxicity for humans. However,
Anopheles gambiae s.l., the main vector of malaria in
Africa, has become resistant to the majority of these
insecticides (Chandre et al., 1999; Koffi et al, 1999).
O ne strategy suggested for the management of resistance
consists in combining a pyrethroid with an insecticide
which has a different mode of action